Q. When radioactive minerals like clevite, monazite and pitchblende are heated to 1273 k in vacuo the noble gas obtained is
A) Rn
B) Kr
C) He
D) Ne
Explanation
(c)
These radioactive minerals have entrapped He atoms, produced from particle, which they give on heating in Vacuo.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.